At least it'd be a challenge to make it work in some non-lame manner. Probably you'd have to make it so that the other player somehow directs what block is thrown, which you might be able to do by modding the other player's body: for instance, surround player 1 with different shaped blocks in all four directions, and have the body of player 2 scattered around the whole area in a way which allows him to push one block into motion, but not do anything else.

This of course probably goes a bit further than what you were looking for. Yet I'm not into suggesting trivial things, that'd be boring. Sorry.